PM32-221M-RC Equivalent & Substitute Parts

Part Overview

The PM32-221M-RC is a 220 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 170 mA continuous current with a maximum DC resistance of 5.7Ohm. This surface mount component operates across the temperature range of -40°C to 125°C and is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical and mechanical specifications can be maintained within the allowed parameter tolerances for this product category.

Substiute Parts

PM32-221M-RC

Bourns Inc.In Stock: 806PM32-221M-RC Datasheet

Current PartRFQ

SDR0302-221KL

Bourns Inc.In Stock: 4051SDR0302-221KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM32-221M-RC is determined by the following critical parameters:

• Inductance value: 220 µH (tolerance range ±10% to ±20% acceptable)
• Current rating: minimum 170 mA
• Saturation current: minimum 190 mA
• DC resistance: maximum 5.7Ohm
• Core material and shielding: Ferrite, unshielded
• Mounting type: Surface mount
• Package footprint: 3.00mm x 2.80mm
• Operating temperature range: -40°C to 125°C minimum
• Self resonant frequency: 8 MHz or higher

The SDR0302-221KL meets all substitution criteria with identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both PM32-221M-RC and SDR0302-221KL are active production components from Bourns Inc. with full ROHS3 compliance and REACH unaffected status. The SDR0302-221KL offers a tighter inductance tolerance of ±10% compared to the PM32-221M-RC at ±20%, providing improved consistency for applications requiring closer inductance specification adherence. Both parts maintain identical electrical performance across current rating, saturation current, DC resistance, and frequency characteristics. Selection between these parts should be based on tolerance requirements and component availability, as all other electrical and mechanical parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can SDR0302-221KL replace PM32-221M-RC in existing designs?

A: Yes. Both inductors share identical inductance values (220 µH), current ratings (170 mA), DC resistance (5.7Ohm max), core type (ferrite drum core, unshielded), package footprint (3.00mm x 2.80mm), and operating temperature range (-40°C to 125°C). The SDR0302-221KL features a tighter tolerance specification (±10% versus ±20%), making it suitable for direct substitution.

Q: What is the difference in inductance tolerance between these parts?

A: The PM32-221M-RC has a tolerance of ±20%, while the SDR0302-221KL has a tolerance of ±10%. For applications where inductance precision is critical, the SDR0302-221KL provides superior consistency. Both tolerances fall within acceptable ranges for standard filtering and impedance matching applications.

Q: Are the package dimensions identical?

A: Yes. Both parts use the same surface mount package with dimensions of 0.118" L x 0.110" W (3.00mm x 2.80mm) and a seated height of 0.110" (2.80mm). PCB footprints and assembly processes are compatible.

Q: Do both parts meet the same compliance standards?

A: Yes. Both PM32-221M-RC and SDR0302-221KL are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings. Both are active production components suitable for current designs.

Q: What are the key electrical parameters that determine substitutability?

A: The critical parameters are inductance value (220 µH), current rating (170 mA minimum), saturation current (190 mA minimum), DC resistance (5.7Ohm maximum), core material (ferrite, unshielded), and self resonant frequency (8 MHz). Both parts meet or exceed all these specifications.